Oops. I should ammend this:

On 4/27/07, neil <musomuso@gmail.com> wrote:
>
> The batteries aren't connected to each other (and to the vehicles
> charging system) with engine off, because relay isn't energized.

to read:

The positive posts on the batteries aren't connected to each other
(and the AUX battery isn't connected to charging system) with engine
off, because relay isn't energized.

Kind of a moot point in regards to the charging system as with engine
off, the alternator ain't doin nothin!

Neil.